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I would assume they are upper level if it's two semesters. The physics program where I went to school we took a 1 semester intro course for each of the main branches. So 1 semester intro to mechanics, 1 semester intro to em, intro to heat light and sound, and an intro to modern physics. Then the upper division courses for EM and QM were two semester courses.
Modern Physics is usually a survey of modern physics but it doesn't go into a depth at all. It's almost always lower level. The in depth courses are reserved for upper level QM and Relativity courses.